You CANNOT use the page size entry as shown in the screen shot to reduce the page size. So the message is perfectly true. Strangely, this function is only for increasing page size (it changes something called the "media box").

To reduce page sizes you have to crop - that is, use the "margin controls". The bottom part of the dialog has to be set to Fixed sizes -- none. (None means "don't change").

As you will observe, that means you cannot use this dialog in a batch to "fix" the page size on a particular value if it might have to reduce.

Well... I hoped to be able to scale the page. That's because the Acrobat text recognition can't run if the page is larger than 45in x 45in, and my page had 46in height, so I hoped to scale it a bit. Cropping is not an option. Guess I need to save pages as images and scale them in Photoshop, then combine to pdf again.

Can I use a fixed page size, if I am using Adobe to display a .PDF file on a Joomla 1.5 platform? I am trying to edit my website without the help of IT Staff. Is that universal advice?See below:http://www.virgincigarette.comDidn't mean to single you out, Bernd. If you're not familiar with how to apply to Joomla, I can try to start a new thread maybe. Up all night in SE Asia trying to sort out the content.

If anyone can point me in the direction of how to integrate adobe with Joomla....it would be much appreciated!

What I really don't get is that it works without using Document Processing. If you just Crop and set the doc size manually to the size you want it works like a charm. Not very helpful when you've got multiple files to edit. It's so bizarre. I think there's an Adobe bug that they really need to fix!

I know this is an old thread, but in case anyone finds it with the same problem, this workaround should help.

I wanted to increase the margins around several documents so that they would print smaller on a given paper size. Whereas I could do this on a single document using the crop tool by entering new dimensions in the Change Paper Size Custom width and height boxes, when I tried to create a new action, the dreaded 'Page size may not be reduced' warning appeared, irrespective of any actual dimensions entered.

Here is the workaround.

1 Open any document, apply the crop tool, and enter the required new paper size in the 'Change Page Size' custom width and height boxes. Make sure that the Page Range is correct; it can’t be changed later. Click on OK. Keep the document open without saving.

2 Click on File>Action Wizard>Create New Action and choose Pages>Crop Pages. Click on the crop options and the settings should be as last set in 1 above. Click on Cancel, and then Save to create a new action with these settings.